Device for filling containers with liquids



May 2, 1933- A MARQNE 1,907,260

DEVICE FOR FILLING CONTAINERS WITH LIQUID Filed NOV. 5, 1931 Fig, 1 10 H :f/ 19 e 30 2 E g M Patented May 2 1933 UNITED STATES PATENT OFFICE.

ALFREDO MARONE, SANTA VITTORIA. DALBA, ITALY DEVICE FOR FILLING GONTAINERS WITH LIQUIDS Application filed November- 5, 1931, Serial No. 573,187, and in Italy November 18, 1930.

This invention relates to a device for filling containers with liquids having the characteristic feature that the filling operation is automatically interrupted when the liquid 5 reaches the desired predetermined level in the container.

The means for automatically interrupting the filling process consists of a valve pressed by a spring tending to bring it into its closed position on its seat and held raised therefrom by a device which is caused to act on the valve for effecting the filling operation and is automatically released so as to permit a ready closure of the valve as soon as 5 the liquid in the container has reached a level such that the liquid stream flowing through the conduit of the apparatus produces, according to Venturis principle, an

' air suction in a chamber having a movable 0 wall (such as bellows, cylinder and piston, a barometric box or a plurality thereof or the like) the movement whereof causes the valve stop member to be released.

According to this invention, the air suction may be produced by an injector of the usual type effecting a constant suction of the air or gas during the flow of the liquid, which will not give raise to any difiiculty when the liquid to be filled into the con tainer does not produce foam, as in the case of water, oil etc. As long as the predetermined level is not reached, the air suction is effected through an orifice communicating with the outside and therefore it does not affeet the movable wall of the above mentioned the injector will be caused to come-into ac-' tion for effecting the air suction only when the predetermined liquid level is'about to be reached. In this case I employ special means for preventing any contact of the liquid The orifice .the movable wall 16 of a chamber 17 the stream with the wall of the terminal portion of the conduit connected through a suitable pipe with the chamber having a movable wall which releases the stop member holding the valve in its open position. The underpres-' sure in this terminal section of the conduit and therefore also in the chamber having the movable wall is generated only when the liquid in the cont. iner reaches the outlet of the apparatus, as the liquid stream then fills Figure 1 is a diagrammatical axial section of the first construction, more particularly for foamyliquids.

Figure 2 shows on an enlarged scale a de tail of a construction of the chamber having a movable wall.

body of the apparatus provided with a liquid inlet 2 and an outlet 3 for the liquid streaming into the container, as well as with a valve 4 of which the spindle 5 is fixedly connected with a steep-pitched screw 6 pressed by a torque spring 8 tending always to bring the valve 4 on its seat for throttling the liquid flow 4 through an axial displacement and rotation of said screw. The end of the screw 6 carries fixed thereto a lever 10 provided with a handle 11 which undergoes the same angular movementsand translation as the screw 6 and valve 4. The lever 10 is brought by a hand 90 operation to the position shown in Figure 1 r and is engaged and retained by the hooked end 12 of a lever 13 pivoted at a fixed point 14, the other end whereof is connected at 15 with wall 18 whereof opposite to thelwall 16 is fixed. T-he chr'mber is closed on its remaining portion by rubber bellows 19 tending to re main open and closing only when an underpressure is generated within the chamber 17. 20 denotes the hose connecting the inside Referring to Figures 1 and 2, 1 denotes the 1 of the chamber 17 with a portion of the con} duit near the outlet 3 and directly below the conical section 3 The conicalsection 3 throttles the liquid stream which is thereby prevented from coming into contact with the walls of the conduit on all the length extend ing from the point 21 where the hose 20 is.

connected with the conduit and the out'et 3. A wire jet-breaker is arranged in the conical section 3 -for regulating the jet issuing from the'valve 4 and preventing whirling motions and other disturbances as might cause the liquid stream to contact with the undcrlyin g wall before the proper moment. Z

In these conditions it-is obvious that during the flow of the liquid no air suction can take place in the section of the conduit extending between the point 21 and the outlet 3 until the level of the liquid in the container has reached the outlet 3, when the liquid is compelled to contact with the walls of the conduit. This immediately causes an air suction to be effected and a partial vacuum to be generated in the chamber 17, of which the movable wall 16 is brought near the wall 18, while the lever 13 rocks about the pivot 14 releasing the ,lever 10 and therefore the spring 8 which closes immediately the valve 4 on its seat stopping the flow of liquid.

The'level control may be operated at any desiredliquid level by varying the depth to which thespout end 3 is inserted into the container to be filled, which may be a barrel or any other kind of receptacle.

It will be understood that the constructional details of my invention may be varied, from the construction of the specific examples described, withinthe scope of the appended.

claims, without departing from'the spirit of the invention.

What I claim is:

1. An apparatus for filling a container with a liquid, comprising a conduit with an enlarged outlet for the liquid, a valve in said conduit having a spindle with a steeppitched screw thread, a cap on which said sired level, comprising, in combination with a valve, spring means tending to bring said valve into the closed position, retaining means for holding said valve in its open position and a member operated by pressure for releasing said valve from the retaining means, a spout end, a jet-breaker in said cutting off the flow of the liquid at a predetermined level comprising, in combination, a conduit for the liquid, a valve in said conduit having a stem with a steep-pitched screw thread, a can on which said stem is screwed,

a torque spring tending to rotate said valve to its closed position, an arm secured to said stem adapted to bring the valve manually into itsopen position, a retaining lever cooperating with said arm for holding said valve open, a member actuated by pressure operatively-connected with said arm to release it from said retaining lever when the pressure is reduced under a predetermined value, a spout end, a jet breaker in said spout end to produce a steady column of liquid descending vertically from said spout end, anenlarged tubular extension of the spout end surrounding said liquid column at its issue from the jet-breaker, and a conduit placingthe interior of said tubular extension in communication with said pressure actuated member.

In testimony whereof, I hereunto aflix my signature.

ALFREDO MARONE.

spindle is screwed, a torque spring tending to rotate said valve to its closed position,

- an arm secured to said spindle for bringing the valve by hand into its closed position, a retaining e and closes the opening of said outletend an underpressure is generated in said chamber for moving said movable wall so as to release said valve from said retaining means.

2. A device for filling containers with liq-.

uids and having means for automatically interrupting the flow of the liquid at the deverco-operating with said arm for holding said valve open, a closed box 

